Display screen with a graphical user interface



FIG. 1 is a first embodiment of a display screen with a graphical user interface;

FIG. 2 is a second embodiment of a display screen with a graphical user interface;

FIG. 3 is a third embodiment of a display screen with a graphical user interface; and,

FIG. 4 is a fourth embodiment of a display screen with a graphical user interface.

The outermost broken line illustrates a display screen. The broken line showing of a display screen in all views are for the purpose of illustrating environmental structure and forms no part of the claimed design. The broken line showing of text, numbers, icons, and boxes illustrate portions of the graphical user interface displayed on the display screen in all views and form no part of the claimed design. The shading shown in dashed lines illustrate portions of the graphical user interface displayed on the display screen and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 